SAE J 297

This SAE Standard is intended to improve operator efficiency and convenience by providing guidelines for the uniformity of location and direction of motion of operator controls used on industrial wheeled equipment. The controls covered are those centrally located at the operator's normal position. General These guidelines are based on the principle that a given direction of movement of any control produces a consistent and expected effect. Where confusion may result from the motion of the control, the effect from movement of the control shall be clearly and permanently identified.